avogadro's number, avogardro's constant

The Avogadro constant (symbols: L, NA), also called the Avogadro number, is the number of atoms in exactly 12 grams of 12C. A mole is defined as this number of "entities" (usually, atoms or molecules) of any material.[1][2] The currently accepted value for this number is:[3]


圖片參考：http://upload.wikimedia.org/math/b/1/3/b1393c3c457066c176cea4157a227411.png

所以兩樣野係一樣